Some chemical aspects of bauxite genesis in Jamaica, 1962, Waterman Glenn C. ,

Evidence is presented that the bauxite is not a residue of limestone erosion. Rather, the bauxite is the product of desilication of airborne volcanic material laid down rapidly across an area marked by well-developed karst topography and abundant rainfall

Bauxite genesis in Jamaica, 1963, Chubb Lj,

Jamaica type bauxites developed on limestones, 1963, Hose H. R. ,

'When the various types of bauxite found on limestones are studied in detail in the field it becomes apparent that the older diasporic and boehmitic bauxites of the northern Mediterranean area developed initially in the same manner as the recently formed Jamaican gibbsitic bauxites.'

The formation of bauxite and karst topography in Eufaula District, Alabama, and Jamaica, West Indies, 1966, Burns Dj,

The formation of bauxite on karst topography in Eufaula District, Alabama, and Jamaica, West Indies, 1966, Clarke Om,

Bauxite deposits are formed on karst topography because the sinkholesentrap aluminous materials subject to laterization. In the Jamaican deposits, these primary aluminous materials are mainly residuum from the White Limestone Formation, but may include some volcanic ash. In the Eufaula deposits, the source materials were kaolinitic claysderived from weathering of crystalline rocks of the Piedmont. The sinkholes provide downward drainage, and deposits formed in them are protected from erosion

Bauxite sur un atoll du Pacifique, 1970, Weisse G. ,

Investigation of bauxites with the help of electron-probe, 1971, Rdossy Gy, Pant__ Gy,

Genesis of Jamaican Bauxite, 1974, Comer Jb,

Rancieite associated with a karstic bauxite deposit, 1978, Bardossy G, Brindley Gw,

Scanning electron microscope study of bauxites of different ages and origins, 1978, Bardossy G, Csanady A, Csordas A,

Relations between the location of the karst bauxites in the northern hemisphere, the global tectonics and the climatic variations during geological time, 1979, Nicolas Jean, Bildgen Pierre,

The study of the distribution of the laterites and bauxites of karst in the Northern Hemisphere shows that their location is not erratic. Most of the bauxites are ordered after their age, according to alignments indicating the existence of palaeoclimatic belts of humid intertropical type that were susceptible of having generated a laterizing pedogenesis, during geological time when these bauxites and laterites were formed. In relation to the present network of latitudes, these palaeoclimatic belts gradually took up more southerly positions, as geological time passed. A few of these formations appear, however, to be located outside the palaeclimatic belts within which they should occur. To explains this apparent anomaly, it is in consequence necessary to call into play on the one hand, the drift of the palaeoclimatic belts from the north to the south, and on the other, the mechanisms of ocean-floor spreading and of the movement of the continental plates. The results of these processes are integrated into the framework of the principles of global tectonics. They also correspond to those obtained from other disciplines, such as palaeomagnetism, palaeoclimatology, biogeography, palaeontology, etc.Extension of this study to the Southern Hemisphere can not be realized for the present, because the results of the researches relating to it in the field with which we are concerned are much too imprecise and the bibliography linked up with it too summary

Karst Bauxites. Bauxite Deposits on Carbonate Rocks, 1982, Bárdossy G.

Nouvelles recherches géomorphologiques sur les karsts méditerranéens, 1983, Nicod, J.

NEW RESEARCHES ON THE MEDITERRANEAN KARSTS - More precise measurements are now being used to establish the rates of which limestone dissolves and the corrosion processes (regular hydrochemical measurements, Iv. GAMS limestone tablets method). In the study of the morphological evolution, the role of the quaternary paleoclimate is estimated by dating on the speleothems and the meaning of the outer carbonate formations has been revealed. Bauxite and terra rossa and various weatings make it possible to specify the pre-quaternary evolution and the origin of paleokarsts. Thanks to new methods, the influence of neotectonic is taken into account, especially the effects of the rise of numerous massifs to which we can add the variations in the sea level with coastal limestone formations. By way of conclusions we must stress the importance of studying karstical surroundings and the problems of applied karstology studies.

Palaeoenvironment of lateritic bauxites with vertical and lateral differentiation, 1983, Valeton Ida,

Formation of lateritic bauxites of the type described in this paper occurs world-wide in Cretaceous and Tertiary coastal plains. The bauxites form elongate belts, sometimes hundreds of kilometres long, parallel to Lower Tertiary shorelines in India and South America and their distribution is not related to a particular mineralogical composition of the parent rock. The lateral movement of the major elements Al, Si, Fe, Ti is dependent on a high level and flow of groundwater. Varying efficiency of subsurface drainage produces lateral facies variations. Interfingering of marine and continental facies indicate a sea-land transition zone where the type of sediments also varies with minor tectonic movements or sea-level changes. A typical sediment association is found in India, Africa, South and North America. It consists of (i) red beds rich in detrital and dissolved material of reworked laterites, (ii) lacustrine sediments and hypersaline precipitates, (iii) lignites intercalated with marine clays, layers of siderite, pyrite, marcasite and jarosite, and (iv) marine chemical sediments rich in oolitic iron ores or glauconite. A model is developed to account for element distributions in lateritic bauxites in terms of groundwater levels and flow. Finally it is shown that many high-level bauxites are formed in coastal plains and that they are subsequently uplifted to their present altitude

Les paléokarsts des Alpes occidentales du Trias à l'Eocène, 1984, Guendon, J. L.

WESTERN ALPS PALEOKARSTS FROM TRIASSIC TO EOCENE - In western Alps, before complete emersion during the Oligocene and Miocene, the marine sedimentation has been locally interrupted by three important continental phases: 1/ during Early Jurassic, in "briançonnais" domain; 2/during middle Cretaceous, in Provence area; 3/ during early Tertiary, in subalpine range and Jura. These locally and temporary regression are the consequence of tectonic activities in relation to the movements of eurasiatic and italo-african plates, which are at the edge of the alpine oceanic basin (Tethys). After an abstract on the tectonic and sedimentological history of western Alps, a description is given of continental formations (bauxites, fire-clay, clay with flints, siderolitic formations, white and ochrous sands, siliceous and ferruginous crusts) and karst phenomena elaborated during these regressions.